Everyone always says "just wait till they walk, you're life will be over"- why?

Does anyone else get told this? I've been told this countless times. I'll express to someone how exciting it is that my 10 month old is crawling/standing/exploring and I'm usually met with something like in the title. Whenever my son becomes more mobile, he becomes happier and I love how active and curious he is. I think I'll probably feel the same once he walks too. Has anyone else felt similarly?